Abrading apparatus



Aug. 7, 1928. 1,679,378

w. R. SANDERS,

ABRADING APPARATUS Filed Oct. 7, 1924 3 Sheets-Sheet l 76 jgaj 76 fl OOOOOOIU L2 Zia/1077107: WAX/[am]? Sal/2616719 Aug. 7, 1928.

W. R. SANDERS ABRADING APPARATUS Filed Oct. 1924 3 Sheets-Sheet 2 fiulantorz Aug. 7, 1928. 1,679,378

w. R. SANDERS ABRADING APPARATUS Filed Oct. 7, 192 3 Sheets-Sheet 5 Lawn-Z07 Q5 M6715 Patented Aug. 7, 1928.

U N'l T EcD l T -A'T E'S' P AT E N T G'FF EC E WIIJLIAM ROBERT SANDERS, OF-

TRIO COMPANY, lnconnona'rnn, or NEW YORK, N. Y., A conromvr-ionor- NEW YORK.

proved apparatus {or of articles preliminary CHICAGO, IIiL-INOIS, ASSIGNOB T WESTERN ELEC- ABBA DING APPARATUS.

Application filed October '7, 1924. Serial 1103742110.

a protective coating thereon.

The object of an improved winet-ho supplying in'g tion an 1 abr adingapparatus. Other objects and 'advantages apparent "in th appended claims.

The preferred embodimentoi tion comprises a having a treatingc or. more blast nozzles are sand or other 'abradingmat sand blasting this invention is'to provide d of and mechanism for material to an=abrad-' will become e following detailedliescripthe novel features of be particularly pointed the inventhe invenapparatus hamber within which onecaused 'todirect erial npon=the surfaces of the articles pontaiined therein.

The used or spent s chamber through apentur'es "in thereofend-is"collected in a 'recept-iaclesuit-- below' 'the treating chamber. tacle and the treating :ehamet which i is pro ably positioned Both the recep ber "are 'inclose'd 'in a cabin and leaves the treating the walls vided' with a movable dump door-"through which the treated a collected ina 'suitab The-spent nected *with 'indep so: that the :sand consumed nearby.

rticle's'areejected and le container positioned sand re'c'eptaiole 'is conendent supply "soun ce in the abrading operation by jc'o'n'versio'n vinto dust and with drawn by lthe exh replaced, thereby maintainingthe sand-in aust "syste'm is constantly the receptacle? at .a substantially; "constant level; The duinp j the sand leveldn th the door 'is opened.

One enibodirnento trated in which Fig. I

tion, of a of F The invention as described abrading apparatus,

copending Serial No.

'1 is a front elev door is positioned above e spent-sand receptacle, thereby preventing the escape of sand when i the invention'is illusthe accompanying drawings, --'in sand blast apparatus ation, partly in sec= embodying resent invention ion on the-line 22 section on thelitie herein illustrated and is particularly adapted to an such "as disclosed inthe application of Robert 'R'oscoe 742,114, filed October wherein like reference characters design-ate" corresponding parts throughout the several VIGYVS, 10 1s a sheetsteel cabinet within whibh-are'inclosed all of the operating parts of the mao'hine. A sand hopper-comprisingtwo-conical shaped receptacles 11 is suitably supported nearthe bottom of the cabinet 10, and sand from a supply source M is introduced into each receptacle-11 through-an inlet pipe 12, which at its point of connection to the side ofthe receptacle 1'1, is disposed at an angle of approximately 45 whereby the sand in the-receptacle-ds maintained at a substantially constant level as indicated by" the dotted =line -A, 'Fig.='3. The bottoi-n or reduced portion ofeach receptacle 11 is open and is connected with a'housing or sand supply fixture Rotatablysupported in theupper part of the=cabinet-10 is a ba'rrel'shaped chamber 15 comprisinga perforated cylindrical portion 16' and end portions 1-7 and'l8; A removabledoor 19forms a part of the cylindrical portion 16 and'is 'providedwith a suitable cam latch 20 by which it is securely locked in position. Sand blast nozzles22 project into the chamber 15 throughMpenings 23 in theend portions '17 and 18thereo-f. Each sandblastnozzle 22 is connected to a CllflIIl" bred fix'tnre '24 which carries therein an air nozzle25 whichextends a short distance into th sand 'blast nozzle 22 to give the correct siphoning effect. The sand supply fixture 13is *connected with the fixture'24 by a pipe 21 which, at the point of connection'wi'th the sand supply fixture 13, is disposed at an angle ofapproximately 45, and throughwhich the sand is dra-wn' there'from' to the sand blast'no'zz le 22; An air agitator nozzle 27 -is located within the fixture 13 and serves to keep the sand therein in a suitable"con lition 'to be drawn,-=and also as sists in moving the sand therefrom through the pipe 21 to the-sand blast nozzle 221 An air supply line 29 is connected with the air nozzle 25 in 'the fixture '24 and with the air agitator nozzle 27 in the sand supply fixture 13. A Water separator 26 of any well known construction is provided in the air line 29 for removing the water therefrom and a suitable pipe or conduit 28 is provided for draining off the water removed thereby. An air nozzle 30, independent of the air nozzle 25, projects into the chamber 15 through the opening 23, and air flowing therethrough serves to remove the dust and pulverized sand from the surfaces of the treated articles before they are removed from the treating chamber. A three way valve 32, provided with an operating lever 33, is connected with the main air line 29 for controlling the air supply to the air nozzles 29 and 30 and to the air agitator nozzle 27.

The treating chamber 15 is supported on a pair of idler rollers 39 and a pair of friction drive rollers 40. The idler rollers 39 are keyed to an idler shaft 41 rotatably journaled in bearings 42, and the friction drive rollers 40 are keyed to a shaft 43 r0- tatably journaled in bearings 44. A sprocket 45 is keyed to the end of the shaft 43 and is driven by a chain 46 from a sprocket 47 se-. cured to a main drive shaft 48. The shaft 48 may be driven from any suitable source of power, such as an electric motor 49, and a gear reducer of a well known type indicated generally at 50, may be employed to operate the machine at the required speed. The sprockets 45 and 47 and the chain 46 are inclosed in a housing 51 secured to the frame 10.

To facilitate introducing articles to be treated into the chamber 15, a tray or loading platform 55 is provided which is hinged at 56 to the frame 10 so that it may be moved to the position wherein it is shown in dotted lines in Fig. 2, when the door 19 is removed from the chamber 15. The construction and operation of the loading platform 55 is fully described in the above mentioned copending application, and since it forms no part of this invention it is thought that a further detailed description thereof is unnecessary.

Suitably supported directly below the treating chamber 15, and disposed at an angle of approximately 45 is a perforated steel plate 60, which is in alignment with a dump chute 61 secured to the frame 10. A dump door 62 is hinged at 63 to the frame 10 and opens inwardly to provide an unrestricted passage for the ejected articles between the plate 60 and the chute 61. The dump door 62 is positioned above the sand level in the spent sand receptacle 11 thereby preventing the escape of sand when the door is open. A lever 64 for operating the dump door 62 is positioned at the side of the cabinet 10, within convenient reach of the operator. A rubber sheet 65, secured to the inner side of the dump door 62,serves to prevent the escape of sand from the cabinet 10.

The cabinet 10 is topped by an exhaust cowl or canopy which is secured to the cabinet and to exhaust pipes 71 by eye bolts 72 so that it can be quickly disconnected and removed when it is necessary to replace or repair the treating chamber 15. The sand which is converted into a pulverized condition by the abrading process is withdrawn through the exhaust. A door 74 is provided on the front side of the cabinet 10 and is adapted to be elevated in suitable guideways to expose the treating chamber 15 during the loading and unloading operations. The door 74 is suspended by cables 75 threaded over pulleys 76 supported by a horizontal Lbeam 77 and connected to balancing weights 78 to facilitate the opening and closing thereof.

The spent sand escapes through apertures in the treating chamber 15 and re-enters 80 the receptacle 11 through a steel screen 81, covering the top opening thereof. The sand level in the receptacle 11 is maintained substantially constant, since the sand consumed in the abrading operation is constantly replaced through the conduit 12 leading from the supply source 14. It is apparent that sand will continue to flow by gravity from the supply source 14 into the receptacle 11 until the sand level therein reaches the top ofthe openingin the conduit 12, as clearly indicated in Fig. 3.

What is claimed is:

1. In an abrading apparatus, a treating chamber for housing an article to a cabinet inclosing said chamber having an opening therein through which the treated article is ejected therefrom, a hopper exterior to one side of the cabinet containing a supply of abrading material, means for conveying the material from said hopper into the treating chamber, and'a receptacle communicating with said hopper and mounted within said cabinet for collecting the spent abrading material, said hopper being in continuous communication with the. receptacle for maintaining the abrading material in said receptacle at a substantially constant level below the opening in said cabinet.

2. In an abrading apparatus, an inclosed cabinet having an opening, a treating chamber housed by the cabinet containing an article to be treated, a receptacle for collecting the spent abrading material from said treating chamber, a storage hopper in communication with said receptacle for continuously supplying material thereto, a movable oor closing an opening in the cabinet in one position through whichthe treated article is ejected therefrom and movable to another position whereby it closes the opening into said receptacle to which the spent material passes- 3. In an abrading apparatus, an inclosed cabinet having an opening, a rotary treating chamber housed therein containing an article to be abraded, a receptacle for collecting the spent abrading material from the treating be treated,

chamber, a storage hopper in communication with the receptacle for continuously supplying abrading material, and a door positioned below the treating chamber closing in one position the opening in the cabinet through which the treated article is ejected and movable to another position whereby it closes the opening into said receptacle to which the spent abrading material passes.

In witness whereof, I hereunto subscribe 10 my name this 26 day of September, A. D. 1924.

WILLIAM ROBERT SANDERS. 

